Measurements of ${}^3_\Lambda \rm{H}$ and ${}^4_\Lambda \rm{H}$ Lifetimes and Yields in Au+Au Collisions in the High Baryon Density Region.
M. S. Abdallah,B. E. Aboona,J. Adam,L. Adamczyk,J. R. Adams,J. K. Adkins,G. Agakishiev,I. Aggarwal,M. M. Aggarwal,Z. Ahammed,I. Alekseev,D. Anderson,A. Aparin,E. C. Aschenauer,M. U. Ashraf,F. G. Atetalla,A. Attri,G. S. Averichev,V. Bairathi,W. Baker,J. Ball,K. N. Barish,A. Behera,R. Bellwied,P. Bhagat,A. Bhasin,J. Bielčík,J. Bielčíková,I. G. Bordyuzhin,J. D. Brandenburg,A. V. Brandin,I. Bunzarov,X. Z. Cai,H. Caines,M. Calderón De La Barca Sánchez,D. Cebra,I. Chakaberia,P. Chaloupka,B. K. Chan,F-H. Chang,Z. Chang,N. Chankova-Bunzarova,A. Chatterjee,S. Chattopadhyay,D. Chen,J. Chen,J. H. Chen,X. Chen,Z. Chen,J. Cheng,M. Chevalier,S. Choudhury,W. Christie,X. Chu,H. J. Crawford,M. Csanád,M. Daugherity,T. G. Dedovich,I. M. Deppner,A. A. Derevschikov,A. Dhamija,L. Di Carlo,L. Didenko,P. Dixit,Xiang-Kun Dong,J. L. Drachenberg,E. Duckworth,J. C. Dunlop,N. Elsey,J. Engelage,G. Eppley,S. Esumi,O. Evdokimov,A. Ewigleben,O. Eyser,R. Fatemi,F. M. Fawzi,S. Fazio,P. Federic,J. Fedorišin,C. Feng,Y. Feng,P. Filip,E. Finch,Y. Fisyak,A. Francisco,C. Fu,Ł. Fulek,C. A. Gagliardi,T. Galatyuk,F. J. M. Geurts,Nirmal Ghimire,A. Gibson,K. Gopal,X. Gou,D. Grosnick,A. Gupta,W. Guryn,A. I. Hamad,A. Hamed,Yifei Han,S. Harabasz,M. D. Harasty,J. W. Harris,H. Harrison,S. He,W. He,X. He,Yuqing He,S. Heppelmann,N. Herrmann,Eric A. Hoffman,L. Holub,Y. Hu,H.-C. Huang,H. Z. Huang,S. Huang,T. Huang,Xinjie Huang,Yi‐Wen Huang,T. J. Humanic,G. Igo,D. Isenhower,W. W. Jacobs,C. Jena,A. Jentsch,Y. Y. Ji,J. Jia,K. Jiang,X. Ju,E. G. Judd,S. Kabana,M. L. Kabir,S. Kagamaster,D. Kalinkin,K. Kang,D. Kapukchyan,K. Kauder,H. W. Ke,D. Keane,A. Kechechyan,M.H. Kelsey,Y. V. Khyzhniak,D. P. Kikoła,C. Kim,B. Kimelman,D. Kincses,I. Kisel,A. Kiselev,A. G. Knospe,H. S. Ko,L. Kochenda,L. K. Kosarzewski,L. Kramárik,P. Kravtsov,L. Kumar,S. Kumar,Raghav Kunnawalkam Elayavalli,J. H. Kwasizur,R. Lacey,S. Lan,J. M. Landgraf,J. Lauret,A. Lebedev,R. Lednický,J. H. Lee,Y. H. Leung,N. A. Lewis,C. Li,W. Li,X. Li,Y. Li,Xunyu Liang,Y. Liang,R. Licenik,T. Lin,Yu-Heng Lin,M. A. Lisa,F. Liu,H. Liu,P. Liu,T. Liu,X. Liu,Y. Liu,Z. Liu,T. Ljubičić,W. J. Llope,R. S. Longacre,E. Loyd,N. S. Lukow,X. Luo,L. Ma,R. Ma,Y. G.,N. Magdy,D. Mallick,S. Margetis,C. Markert,H. S. Matis,J. Mazer,N. G. Minaev,S. Mioduszewski,B. Mohanty,M. M. Mondal,I. Mooney,Д. А. Морозов,A. Mukherjee,M. I. Nagy,J. D. Nam,Md. Nasim,K. Nayak,D. Neff,J. M. Nelson,D. B. Nemes,M. Nie,G. Nigmatkulov,T. Niida,R. Nishitani,L. V. Nogach,T. Nonaka,A. S. Nunes,G. Odyniec,A. Ogawa,SK Oh,V. Okorokov,B. S. Page,R. Pak,J. Pan,A. Pandav,A. K. Pandey,Y. Panebratsev,P. Parfenov,B. Pawlik,D. Pawłowska,C. Perkins,L. Pinsky,R. L. Pintér,J. Pluta,B. R. Pokhrel,G. Ponimatkin,J. Porter,M. Posik,V. Prozorova,N. K. Pruthi,M. Przybycień,J. Putschke,H. Qiu,A. Quintero,C. Racz,S. K. Radhakrishnan,N. Raha,R. L. Ray,R. Reed,H. G. Ritter,M. Robotkova,O. V. Rogachevskiy,J. L. Romero,D. Roy,L. Ruan,J. Rusňák,A. K. Sahoo,N. Sahoo,H. Sako,S. Salur,J. Sandweiss,S. Sato,W. B. Schmidke,N. Schmitz,B. R. Schweid,F. Seck,J. Seger,M. Sergeeva,R. Seto,P. Seyboth,N. Shah,E. Shahaliev,P. V. Shanmuganathan,M. Shao,T. Shao,A. I. Sheikh,D. Y. Shen,S. S. Shi,Yanmeng Shi,Q. Shou,E. P. Sichtermann,R. Sikora,M. Simko,Jagbir Singh,S. Singha,M. J. Skoby,Н. Н. Смирнов,Y. Söhngen,W. Solyst,P. Sorensen,H. M. Spinka,B. Srivastava,T. D. S. Stanislaus,M. Stefaniak,D. J. Stewart,M. Strikhanov,B. Stringfellow,A. A. P. Suaide,M. Šumbera,B. Summa,X. M. Sun,X. Sun,Y. Sun,B. Surrow,D. N. Svirida,Z. W. Sweger,P. Szymański,A. H. Tang,Z. Tang,A. Taranenko,T. Tarnowsky,J. H. Thomas,A. R. Timmins,D. Tlusty,T. Todoroki,M. Tokarev,C. A. Tomkiel,S. Trentalange,R. E. Tribble,P. Tribedy,S. K. Tripathy,T. Truhlar,B. A. Trzeciak,O. D. Tsai,Zhong-Hao Tu,T. Ullrich,D. G. Underwood,I. Upsal,G. Van Buren,J. Vaněk,A. Vasiliev,I. Vassiliev,V. Verkest,F. Videbæk,S. Vokál,S. A. Voloshin,F. Wang,G. Wang,J. S. Wang,P. Wang,X. Wang,Y. Wang,Z. Wang,J. C. Webb,P. C. Weidenkaff,Lingling Wen,G. D. Westfall,H. Wieman,S. W. Wissink,R. Witt,Jia-Jun Wu,Y. Wu,B. Xi,Zhiguang Xiao,G. Xie,W. Xie,H. Xu,N. Xu,Q. H. Xu,Yongli Xu,Z. Xu,Yan Guo,Cheng Tao Yang,Q. Yang,S. Yang,Yifan Yang,Z. Ye,L. H. Yi,K. Yip,Y. Yu,H. Zbroszczyk,W. Zha,C. Zhang,D. Zhang,J. Zhang,S. Zhang,X. P. Zhang,Y. Zhang,Z. J. Zhang,Z. Zhang,J. Y. Zhao,C. Zhou,Yifan Zhou,Xiaoyu Zhu,M. Żurek,M. Zyzak
arXiv (Cornell University)（2021）
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摘要
We report precision measurements of hypernuclei ${}^3_\Lambda \rm{H}$ and ${}^4_\Lambda \rm{H}$ lifetimes obtained from Au+Au collisions at \snn = 3.0\,GeV and 7.2\,GeV collected by the STAR experiment at RHIC, and the first measurement of ${}^3_\Lambda \rm{H}$ and ${}^4_\Lambda \rm{H}$ mid-rapidity yields in Au+Au collisions at \snn = 3.0\,GeV. The lifetimes are measured to be $221\pm15(\rm stat.)\pm19(\rm syst.)$\,ps for ${}^3_\Lambda \rm{H}$ and $218\pm6(\rm stat.)\pm13(\rm syst.)$\,ps for ${}^4_\Lambda \rm{H}$. The $p_T$-integrated yields of ${}^3_\Lambda \rm{H}$ and ${}^4_\Lambda \rm{H}$ are presented in different centrality and rapidity intervals. It is observed that the shape of the rapidity distribution of ${}^4_\Lambda \rm{H}$ is different for 0--10\% and 10--50\% centrality collisions. Thermal model calculations, using the canonical ensemble for strangeness, describes the ${}^3_\Lambda \rm{H}$ yield well, while underestimating the ${}^4_\Lambda \rm{H}$ yield. Transport models, combining baryonic mean-field and coalescence (JAM) or utilizing dynamical cluster formation via baryonic interactions (PHQMD) for light nuclei and hypernuclei production, approximately describe the measured ${}^3_\Lambda \rm{H}$ and ${}^4_\Lambda \rm{H}$ yields.
